diff --git a/scrapy/downloadermiddlewares/cookies.py b/scrapy/downloadermiddlewares/cookies.py
index 0d2b9900c..aeb7578b8 100644
--- a/scrapy/downloadermiddlewares/cookies.py
+++ b/scrapy/downloadermiddlewares/cookies.py
@@ -1,8 +1,8 @@
-import os
-import six
 import logging
 from collections import defaultdict
 
+import six
+
 from scrapy.exceptions import NotConfigured
 from scrapy.http import Response
 from scrapy.http.cookies import CookieJar